力-热场耦合无氟碱酸法石墨提纯试验研究
Experimental Study on Graphite Purification by Force-Thermal Field Coupling Fluorine Free Alkali Acid Method
黄建树 1刘定桦 1贺洋 1程飞飞 1刘克起 1于阳辉1
作者信息
- 1. 苏州中材非金属矿工业设计研究院有限公司,江苏 苏州 215151;国家非金属矿深加工工程技术研究中心,江苏 苏州 215151
- 折叠
摘要
为了提升碱酸法制备高纯石墨品位,降低环境污染,本试验以萝北石墨浮选精矿为原料,研究了力-热场耦合无氟碱酸法对石墨的提纯效果.结果表明,在NaOH用量为250 kg/t,碱熔温度为750℃,碱融时间为60 min,HCl用量为300 kg/t,酸浸温度为85℃,酸浸时间为4 h的条件下,进行两段超声:第1段为360 W超声强度,80℃温度下洗涤30 min(碱熔后);第2段为180 W超声强度,70℃温度下洗涤20 min(酸浸后),最终制备出的高纯石墨固定碳含量高达99.973%,Si含量为101 μg/g,Al含量为31 μg/g,Fe含量为29 μg/g.
Abstract
In order to improve the grade of high-purity graphite prepared by alkaline acid method and reduce environmental pollution,this study used Luobei graphite flotation concentrate as raw material to study the purification effect of force-thermal field coupling fluorine-free alkaline acid on graphite.The results showed that under the conditions of NaOH dosage of 250 kg/t,alkali melting temperature of 750℃,alkali melting time of 60 min,HCl dosage of 300 kg/t,acid leaching temperature of 85℃,and acid leaching time of 4 h,two ultrasonic stages were carried out:the first stage was 360 W ultrasonic intensity,washed at 80℃for 30 min(after alkali melting),and the second stage was 180 W ultrasonic intensity,washed at 70℃for 20 min(after acid leaching),the final high-purity graphite was obtained with a fixed carbon content of 99.973%,Si content of 101 μg/g,Al content of 31 μg/g,and Fe content of 29 μg/g.
关键词
高纯石墨/碱酸法/石墨提纯/多场耦合Key words
high purity graphite/alkali acid method/graphite purification/multi field coupling引用本文复制引用
出版年
2024
NETL
NSTL
万方数据